我的代码有问题。函数 Decryptor 中出现问题。
FlushFinalBlock 抛出“填充无效，无法移除”
在函数 Decryptor 中，当行 cryptoStream.Write(myData, 0, myData.Length); 时，我得到长度为 6048 的 myData 完成后我在 memoryStream 中得到长度 6032，然后是 cryptoStream.FlushFinalBlock(); 抛出错误“填充无效，无法删除。”
如您所见，我正在使用 Padding = PaddingMode.PKCS7;
static RijndaelManaged rmCrypto;
static object lockCryptoStream = new object();
public static void SetrmCrypto()
{
rmCrypto = new RijndaelManaged();
rmCrypto.Padding = PaddingMode.PKCS7;
rmCrypto.KeySize = 128;
rmCrypto.Key = new ASCIIEncoding().GetBytes("xxxxxxxxxxxxxxxx");
rmCrypto.IV = new ASCIIEncoding().GetBytes("yyyyyyyyyyyyyyyy");
}
public static byte[] Encryptor(byte[] myData)
{
lock (lockCryptoStream)
{
using (var memoryStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(memoryStream, rmCrypto.CreateEncryptor(rmCrypto.Key, rmCrypto.IV), CryptoStreamMode.Write))
{
cryptoStream.Write(myData, 0, myData.Length);
cryptoStream.FlushFinalBlock();
cryptoStream.Close();
return memoryStream.ToArray();
}
}
}
}
public static byte[] Decryptor(byte[] myData)
{
lock (lockCryptoStream)
{
using (var memoryStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(memoryStream, rmCrypto.CreateDecryptor(rmCrypto.Key, rmCrypto.IV), CryptoStreamMode.Write))
{
cryptoStream.Write(myData, 0, myData.Length);
cryptoStream.FlushFinalBlock();
cryptoStream.Close();
return memoryStream.ToArray();
}
}
}
}
服务器上使用加密器，数据通过UDP发送。客户端使用解密器而不是解密数据。代码适用于大多数数据包，可以说它可以工作几个小时，但之后我在 Flushing 上遇到错误。